Manipulation and certification of high-dimensional entanglement through a scattering medium

TL;DR

This paper demonstrates a wavefront shaping method to transmit high-dimensional entangled photons through scattering media, preserving entanglement and certifying high entanglement dimensionality, advancing quantum communication and imaging.

Contribution

It introduces a classical wavefront correction technique to maintain high-dimensional entanglement through scattering media, enabling practical quantum applications.

Findings

Entanglement preserved after scattering media with 988 sigma violation.

Certified entanglement dimensionality of 17.

Wavefront shaping enables entanglement transport through disorder.

Abstract

High-dimensional entangled quantum states improve the performance of quantum technologies compared to qubit-based approaches. In particular, they enable quantum communications with higher information capacities or enhanced imaging protocols. However, the presence of optical disorder such as atmospheric turbulence or biological tissue perturb quantum state propagation and hinder their practical use. Here, we demonstrate a wavefront shaping approach to transmit high-dimensional spatially entangled photon pairs through scattering media. Using a transmission matrix approach, we perform wavefront correction in the classical domain using an intense classical beam as a beacon to compensate for the disturbances suffered by a co propagating beam of entangled photons. Through violation of an Einstein-Podolski-Rosen criterion by $988$ sigma, we show the presence of entanglement after the medium. Furthermore, we certify an entanglement dimensionality of $17$. This work paves the way towards manipulation and transport of entanglement through scattering media, with potential applications in quantum microscopy and quantum key distribution.